swaks

Swiss Army Knife SMTP, the all-purpose SMTP transaction tester. More information: https://github.com/jetmore/swaks/blob/develop/doc/base.pod.

• Deliver a standard test email to [email protected] on port 25 of test-server.example.net:
  swaks --to {{[email protected]}} --server {{test-server.example.net}}
• Deliver a standard test email, requiring CRAM-MD5 authentication as user [email protected]. An "X-Test" header will be added to the email body:
  swaks --to {{[email protected]}} --from {{[email protected]}} --auth {{CRAM-MD5}} --auth-user {{[email protected]}} --header-X-Test "{{test_email}}"
• Test a virus scanner using EICAR in an attachment. Don't show the message DATA part:
  swaks -t {{[email protected]}} --attach - --server {{test-server.example.com}} --suppress-data {{path/to/eicar.txt}}
• Test a spam scanner using GTUBE in the body of an email, routed via the MX records for example.com:
  swaks --to {{[email protected]}} --body {{path/to/gtube_file}}
• Deliver a standard test email to [email protected] using the LMTP protocol via a UNIX domain socket file:
  swaks --to {{[email protected]}} --socket {{/var/lda.sock}} --protocol {{LMTP}}